Heat-conserver for gas-stoves.



@mm1/woz H BUNCH Patented May 15, 1917.

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HEAT coNsERvER FOR GAS sTovEs.

APPLICATION FILED AUG.2I| I9I6.

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@1I/IMM m HARRY BUNCE, OF EAST SLIP, NEW YORK.

HEAT-CONSERVER FOR GAS-STOVES.

Specification of Letters Patent.

Patented May f5, i937..

Application filed August 2l, 1916. Serial No. 116,034.

To allan/tom t may concern: p

Be 1t known that l, HARRY BUNcn, a citizen of the United States, residing at East Islip, in the county of Suffolk, State of New York, have invented a new and useful Heat- Conserver for Gas-Stoves; and l do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates tov certain new and useful improvements in cooking stoves of that general type which are designed to burn gas, the object of the invention being to provide a stove of this character which embodies novel features of construction whereby the heat from the burner is confined and concentrated within a heat chamber, thereby preventing the loss of heat which is incident to the use of open burners, and enabling a single burner to do the work which is ordinarily done with several burners, with the result that there is a great saving in the consumption of gas.

Further objects of the invention are to provide a device of this character which is comparatively simple and inexpensive in its construction, which can either be applied as an attachment to an ordinary gas stove or built into a special stove, which can be easily manipulated, and which enables all kinds of cooking to be performed in the same manner as upon an ordinary stove.

With these and other objects in View, the invention consists in certain novel combinations and arrangements of the parts as will more fully appear as the description proceeds, the novel features thereof being pointed out in the appended claims.

For a full understanding of the invention, reference is to be had to the following description and accompanying drawing, in which v Figure 1 is a perspective view of a heat conserving'k attachment constructed in accordance with the invention, showing the same as fitted upon the top of an ordinary gas stove.

Fig. "2 is a vertical longitudinal sectional view through the same.

Fig. 3 is a horizontal sectional View;

Fig. l is a' bottom plan View.

Fig. 5 is a diagonal view through one of the corners, taken on the line 5 5 of Fig. 3.

Fig. 6 isa side elevation of a cooking stove embodying the invention.

4upon opposite sides of the Fig. 7 is a top plan view of the saine with' one of the lids removed.

Corresponding and like parts are referred to in the following description and indicated in all the views of the drawings by the same reference characters.

rEhe idea of the invention is to conserve the heat from a single burner by the provision of a shallow casing which is arranged over the burner, said casing having suitablercooking openings in the top thereof which are closed by tightly fitting lids, and dampers being provided on the interior of the casing for subdividing the same into a series of small heat chambers when desired. This casing, as shown by Fig. l, may be constructed to be used as an attachment upon an ordinary gas stove A. The casing has substantially the same size and configuration as the top of the gas stove, and is comparatively shallow in depth, the top 1 thereof being provided with a series of cooking openings 2, while the bottom 3 thereof is provided with an opening l to fit over one or more of the burners of the stove A. lThe side walls 5 are provided with a layer 6 of asbestos to more effectively conserve the heat, and the front of the casing is provided with an air inlet opening 7 for supplying air to the burner. A series of small air inletopenings 8 are arranged in the side walls 5 of the casing at a point toward the bottom thereof, said openings being too small in size and located too near the bottom of the casing to interfere with confining and concentrating t-he heat from the burner in the contemplated manner. The cooking openings 2 are provided with tightly tting removable lids 9 which are kept in position at all times except when a cooking utensil is applied to one of the openings.

Corresponding forwardly and rearwardly extending damper plates 10 are provided bottom opening 4, said plates being hinged at 11 to the bottom and being adapted to be swung upwardly into engagement with the top and side walls to cut off the heat from the ends of the casing. When these dampers 10 are swung upwardly into operative position 'the heat from the burner is confined within a small heat chamber, therebv eliminating the necessity of heating the entire casing when only one or two of the cooking holes 2 are to be used. These dampers 10 may be operated in any suitable manner as by means of plunger rods 12 which extend transversely across the casing in opposite directions and project through openings 13 rovided in the side walls 5 of the casing. gy pulling upon these plunger rods 13 the` dampers 10 can be swung upwardly into operative position, and the front -and rear walls of the casing may be provided with inwardly extending stop flanges 14C for engagement with the said dampers when they are in a vertical position. The extremities of the operating rods 12 may terminate in weights 15, said weights being adapted to be used as handles,and also serving to hold notches 16 provided in the plungers in engagement with edges 17 for the purpose of locking the dampers in an adjusted position.

Extending transversely between the dami pers 10 and arranged to the rear of the opening 4 in the bottom of the casing is a third damper 18 which is hinged at 19 to the bottom of the casing. A rock shaft-'2O 'extends laterally through one side ofthe casing and is connected to the damper L18 for swinging the same upwardly and downwardly. A small crank handle 21 may be provided for operating the rock shaft, and this crank handle may have a spring formation so as to yieldably engage a segmental rack bar 22 to hold the damper in an adjusted position. rlhe provision of this third damper 18 admits of a still smaller chamber being provided for conning and concentrating the heat, so that all waste of fuel can vbe avoided when there is but a single one of the cooking holes 2 to be used. l

The interior corners of the casing 1 may be provided with curved deilectors 28 for concentrating the heat at the top of the casing and preventing waste thereof at the angular corners. Forv baking purposes an oven D would be used, said oven being of the conventional construction, with the exception that it has an open bottom so that it can be placed over one or more of cooking openings 2.

ln Fig. 6, the invention is shown as built into a special stove, thereby providing a complete unit for cooking purposes. The construction is practically identical with that previously described, with the exception that the bottom v3 of the casing forms the 'top of a suitable stand C, and there is no need to provide the openingjl, since a the single burner B is arranged withithe cas- I claim as new and desire to secure by Letters Patent, is z- 1. A cooking stove including a gas burner, a shallow casing arranged over the gas burner and inclosing a heat conserving chamber, the top of the casing being provided with a series of cooking openings," removable lids for the cooking openings, a pair of substantially parallel dampers extending across the casing on opposite sides of the burner and arranged to shut off the end portions of the casing from the middle portion thereof, a transverse damper extending between the parallel dampers on one side of the burner for further reducing the size of the heat chamber, 'and means for operating the said dampers.

2. A cooking stove including a gas burner, a shallow casing `arranged over the gas burner and inclosing a heat conserving chamber, the top of 'the casing being providedl with a series of cooking openings, removable lids for the cooking openings,` a pair of substantially parallel dampers ex? tending across the `casing on opposite sides of the burner, said dampers being hinged to the bottom of the casing and being adapted to be swung upwardly into fengagement with the top thereof to shut off the end portions of the casing from the middle portion thereof, transversely extending operating rods connected to the dampers and ex-4 tending through the sides of the casing for manipulating the dampers,` a 'transverse damper extending between the parallel dampers on one side of the-burner for further reducing the size of the heat chamber, a rock shaft extending along the bottom of' the casingand carrying the transverse damper, and means for rotating 'the\rock shaft to move the transverse-damper into operative and inoperative positions.

In testimony whereof vI have signed my name to this specication in the presence of two subscribing witnesses.

- HARRY BUNCE. Witnesses:

CHARLES H. SMISEK, FRANK PARKER. 

